body {
    font-size: 20px;
    line-height: 150%;
    color: #fff;
    text-align: center;
}

html, body {
    background-color: #282828;
}

.box {
    overflow: hidden;
}

#chess {
    /*display: inline;*/
    /*text-align: right;*/
    float: right;
    /*margin: 20px auto;*/
}

.chess_left, .chess_right {
    float: left;
}

.chess_left {
    width: 60%;
}

.chess_right {
    width: 35%;
    /*display: flex;    */
    /*align-items: center;*/
    /*justify-content: center;*/
    padding-top: 201px;
}

/*.box {
    margin: 0 auto;
    width: 738px;
    position: relative;
}*/

/*canvas {
    margin: 0 auto;
}*/

/*.chess_left {
    float: left;
    text-align: center
}*/
/*
.chess_right {
    float: left;
    display: none
}*/

/*.move_info {
    float: left;
    margin-top: 20px;
    margin-left: 10px;
    color: #fff;
}

.bill_box {
    height: 320px;
    width: 80px;
    overflow: auto;
}

.bill_box li {
    cursor: pointer;
    text-align: left
}

.bill_box li:hover {
    cursor: pointer;
    background: #C6A577;
}

.bill_box li:active {
    cursor: pointer;
    background: #fff;
}*/

/*#billList {
    margin-top: 20px
}   

.bn_box {
    display: none
}*/

/*.download {
    margin-top: 30px
}*/

#tip, #explain {
    display: block;
    padding: 10px;
}

button {
    font-size: 18px;
    font-weight: 400;
    border-radius: 5px;
    padding: 5px;
    margin: 10px;
    color: #333;
    border: 1px solid transparent;
    background-color: #fff;
    border-color: #ccc;
}

button:hover { 
    color: #333;
    background-color: #e6e6e6;
    border-color: #adadad;
    cursor: pointer;
}